Photoinitiator-TPO CAS NO.75980-60-8

photoinitiator tpo

chemical name: 246-trimethylbenzoyldiphenyl phosphine oxide

cas no. : [75980-60-8]

formula: c₂₂h₂₁o₂p

formula weight: 348.37

chemical structure:

appearance: light yellow powder

purity: 99.0%min

melting point: 90.0-94.0 ℃

loss rate：volatile matter：≤0.5%; ash content：≤0.1%；

dlarity：10 g / 100 ml toluene

advantages:

1. its photocuringspeed is fast

2. have light-decolourizatio

3. can be used for thick coating curing

4. belongs to low-volatilitymild-smell and environment friendlyproduct

5. anti-yellowing

character and application:

tpo appears light yellow powdermelting point is at 90-94℃and it has enough solubility in active diluents. since it has a wide range of absorptionthe typical absorptions are at 365nm380nm400 nmand the maximum absorption wavelength is about 425nmits absorption rangeis wider than conventional photoinitiatorsand it can absorb well different wavelength uv-lights. it can generate two free radicals——benzoyl and phosphorus acyl which both can initiatepolymerizationthereforeits photocuringspeed is fastand that it has light-decolourizatiois suitable for thick film deep curingmoreoverthe coating doesn’t turn to yellowand it is also fit for water basewith the characteristicof low volatilitymild smell and anti-yellowing.

this product usually be used in the white systemcan be used in uv cure coatingsprinting inkuv curing adhesivesoptical fiber coatingslight stabilizerlight polymerization formestereo surface plateresincomposite materials and teeth filling materialetc..

the usage of this product should base on the results of practicalexperimentsand the suggested volume of addition is 0.5-5 % (w/w).

in consideration ofthat tpo also absorbs a little in the visible regionit should be protected from light in the process of storage and transportation.